MLA

Ehlers, H. J. Defence against Abuse and Slander, with Some Strictures on Mr. Downing's Book on Landscape Gardening ... W.C. Bryant & Co., Printers, 1852. https://collections.library.yale.edu/catalog/17376188.

APA, 6th edition

Ehlers, H. J. (1852). Defence against abuse and slander, with some strictures on Mr. Downing's book on landscape gardening ... [Treatises]. W.C. Bryant & Co., Printers. https://collections.library.yale.edu/catalog/17376188.